<template>
  <div>
<ul>
  <li v-for="item in arr" :key="item">{{item}}</li>
</ul>
<button @click="fn">走一走</button>
  </div>
</template>

<script>
export default {
data () {
  return {
    arr:['帅哥','美女','程序员']
  }
}
,methods:{
  fn(){
    this.arr.push(this.arr[0])
    this.arr.shift()
  }
}
}
</script>

<style>

</style>